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SEIKO PROSPEX SBDX012

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Prospex Marinemaster Professional 50th Anniversary Edition Automatic Diver Scuba 300M Black Dial Silver Stainless Steel Bracelet Limited Edition from Japan Domestic Market

  • 1 year official warranty
  • Automatic Movement with Manual Winding Capacity
  • Movement 8L35
  • Silver Stainless Steel Case with Diashield Coating
  • Silver Stainless Steel Bracelet
  • Dual-curved Sapphire Crystal Glass Material with Anti-reflective Coating
  • Black Dial
  • 26 Jewels
  • Power Reserve 50 hours
  • +15 to -10 seconds per day Accuracy
  • Magnetic Resistance
  • Vibration Frequency 21,600 bph
  • Date Display
  • Screw Case Back
  • Screw-Down Crown
  • Unidirectional Rotating Dark Zirconia Ceramics Bezel with Anti-reverse Spin Function
  • Stop Seconds Hand Function
  • Fold Over Push Button Clasp
  • Size H 50.5 mm x W 44.3 mm x D 14.6 mm
  • 300 m Water Resistance suitable for Divers
  • 214 g
  • Included Extra Seiko Polyurethane Strap
  • Limited Edition of 1,000 pcs

Description

SEIKO Prospex SBDX012 Specifications : 

Feature
Driving system Automatic with manual winding mechanism
Caliber Number 8L35
Case material Stainless steel with diashield coating
Case back Solid
Glass material Dual-curved sapphire crystal with anti-reflective coating on inner surface
Band type Bracelet
Band material Stainless steel
Band color Silver
Band width 20 mm
Clasp Fold over with double push button safety
Dial color Black
Hands Luminous grey and gold tone (hour, minute) with red and gold tone second hand
Dial markers Grey and gold tone dots and baton indexes at 6, 9 and 12 o’clock position
Second markers Minutes markers around the outer rim
Lumi Brite Hands, indexes and bezel’s dot at 12 o’clock position
Bezel Unidirectional one-way rotating black colored dark zirconia ceramics with gold tone arabic numerals minutes markers per 10 minutes
Crown Screw down
Calendar Date display at 3 o’clock position
Function Date, hour, minute, second, stop second hand
Accuracy +15 to -10 seconds per day
Vibration 21,600 vibrations per hour
Drive duration Power reserve: 50 hours
Magnetic reluctance Magnetic resistance 4,800 A/m
Water resistance 300 m water resistance suitable for saturation diving
Size Height: 50.5 mm x Width: 44.3 mm x Diameter: 14.6 mm
Weight 214 g

SEIKO Prospex SBDX012 Features : 

  • “LIMITED EDITION” engraved on the case back
  • Serial number engraved on the case back
  • One-piece construction
  • Unidirectional one-way rotating black dark zirconia ceramics bezel
  • Screw down crown
  • Fold over with double push button safety clasp
  • Jewels: 26 jewels
  • Stop second hand function

About Seiko Prospex Sea Diver SBDX012

From the introduction in 1965 as Japan’s first diver’s watch, the engineers never stopped to innovate. The trust this watch has gained goes beyond the borders of Japan and into the world. Because of that, Seiko facilitated the establishment of the standard for diver’s watches in International Standard Organization (ISO), and Japan Industrial Standards (JIS). As for the ISO, Seiko lobbied the organization to amend the standard to match the actual use of diver’s watches in the deep sea. In 1996, ISO6425 with annex, about diver’s watches for mixed gas diving, was issued. Moreover, Seiko’s relentless challenge and innovation have driven the company to create a model that could truly be called authentic.

Behind Seiko’s diver’s watch that has been chosen by divers world wide, there are qualified engineers who work to developed technology that the world has never seen.

First, through significant innovation, water resistance and impermeability has proven to be the finest in world class. Above all, along with functionality, using specialized material and precise detail in structure, the timepiece is made to perfection. In addition, Seiko’s determination and innovative technology resulted in many patents to preserve the company’s authenticity.

Since then, there are countless products labeled as a diver’s watch around the world but only a negligible number of these timepieces are functional in professional environments.

History of Seiko Prospex Sea Diver SBDX012

 

The start of a tradition

Seiko created Japan’s first diver’s watch in 1965.
This watch inaugurated five decades of innovation that have made Seiko diver’s watches the global standard. Seiko’s first high-beat diver’s watch, created in 1968, is an important part of this tradition.

With a 10-beat high precision automatic caliber, a one-piece structure, a mono-directional rotating bezel and screw-down protection crown, the success of this model laid the foundation for the Seiko diver’s watch development which has now, for 50 years, pushed back the frontiers of precision, durability and ease of use in watches for professional and recreational divers.

Progression of Seiko Prospex Sea Diver

Seiko Prospex Sea Diver. Antarctic Team of the Geospatial Information Authority of Japan

Earning credibility through vigorous adventures in the North and South Pole.

From 1966, the timepiece has been brought on 4 missions with the Antarctic Team of the Geospatial Information Authority of Japan. Later on, numerous adventurers and explorers have made achievements such as successfully ascending Everest gearing Seiko’s diver’s watch. After years of proving itself worthy of withstanding extreme environments, Seiko’s diver’s watch has earned its integrity.

Seiko Prospex Sea Diver. Seiko Diver Watch Seiko Prospex Sea Diver. Shinkai 2000

Exceeding any expectation of water resistance with the depth of 1062 meters.

In May of 1983, two Professional Diver’s 600 meters were mounted on Shinkai 2000, a research submersible used by JAMSTEC (Japan Agency for Marine-Earth Science and Technology). The watch was originally intended for use up to 600 meters, yet the timepiece withstood water pressure at a depth of 1062 meters. As a result, the watch’s legibility, precision, and exterior remained unscathed, continuing to strengthen its credibility.

Courtesy: JAMSTEC

 

Seiko Prospex Sea Diver. Result of saturation driving graph
Water-Resistance:Air tightness
The result of 300m saturation diving: Pressure inside the watch case for brand other brands (A, B, C) and Seiko Professional Diver’s
The vertical line shows the pressure inside the watch case and the horizontal line indicates the period of time.
After the dive, the air pressure inside the watch case gradually went up.
Seiko Professional diver’s scored the best result and verified that it is strong enough to function even at great depths.

Proving its significant impermeability.

For saturation diver’s watches, helium is a constant issue. That is to say, the gas penetrates the glass, and in some cases the difference in external and internal air pressure causes the glass cover to break. While other companies focus on methods to release Helium with an escape valve, Seiko took a different turn and developed a glass case that is practically impermeable to Helium gas. This is the creation of Seiko’s Diver’s Professional 600M. Then, in 1983, JAMSTEC conducted an impermeability test by submersing several diver’s watches under 300M saturation diving. Consequently, Seiko’s Diver’s Professional 600M proved to be up to ten times more impermeable to Helium gas compared to other companies. In short, the true diver’s watch continues to prove itself.

Courtesy: JAMSTEC

History of Seiko

The company was founded in 1881, when Kintarō Hattori opened a watch and jewerly shop called “K. Hattori” (服部時計店 Hattori Tokeiten) in the Ginza area of Tokyo, Japan. Eleven years later, in 1892, he began to produce clocks under the name Seikosha, meaning roughly “House of Exquisite Workmanship”.

The first watches produced under the Seiko brand appeared in 1924. In 1969, Seiko introduced the Astron, the world’s first production quartz watch, it cost the same as a medium-sized car. Seiko later went on to introduce the first quartz chronograph.